CN116614485A - Communication method, device and electronic equipment between client and server - Google Patents

Abstract

The application discloses a communication method, device and electronic equipment between a client and a server. Among them, the method includes: obtaining the data updated in the current update cycle in the database and the storage address corresponding to the data; sending the storage address to the client, wherein the storage address carries a synchronization sequence identifier, which is used to indicate that the server The request message sent; when the response message sent by the client is not received within the preset timeout period, the operation of retransmitting the data overtime is performed; when the number of data retransmissions reaches the preset threshold and there is no When the response message sent by the client is received, the data stored in the storage address is recorded in the exception database, and the client is prompted that an exception occurs. This application solves the technical problem that the reliability and consistency of messages cannot be guaranteed when a long connection is established between the server and the client.

Description

Communication method, device and electronic equipment between client and server

technical field

The present application relates to the field of data communication, in particular, to a communication method, device and electronic equipment between a client and a server.

Background technique

When the user is operating data in the background, the server needs to notify the client of some changed data in a timely manner (a series of products of the company, such as interactive large boards, picture screens, digital signage, etc.), but the server has no way to actively request the client. Therefore, it is often necessary to establish a long connection between the server and the client. How to ensure the stability of the long connection, as well as the reliability and consistency of the message, is a matter of value.

For message reliability, that is, we need to ensure that the request sent by the server can be received by the client. If the request cannot reach the client due to network reasons, we also need a mechanism to ensure that the user can know the situation.

For consistency, based on the actual business of the cloud screen, the large board client is more unstable than the server, and will shut down more frequently (normal and abnormal) due to various practical factors. To this end, we need to provide a mechanism that allows the client to ensure data consistency after the network returns to normal.

For the above problems, no effective solution has been proposed yet.

Contents of the invention

Embodiments of the present application provide a communication method, device, and electronic device between a client and a server, so as to at least solve the technical problem that the reliability and consistency of messages cannot be guaranteed when a long connection is established between the server and the client.

According to an aspect of the embodiment of the present application, a communication method between a client and a server is provided, including: acquiring data updated in the current update period in the database and a storage address corresponding to the data; sending the storage address to the client, Among them, the storage address carries a synchronization sequence identifier, and the synchronization sequence identifier is used to represent the request message sent by the server; when the response message sent by the client is not received within the preset timeout period, the operation of retransmitting the data overtime is performed, Wherein, the response message is a response to the data retransmission result corresponding to the storage address and the synchronization sequence identifier; when the number of data retransmissions reaches the preset threshold and the response message sent by the client is not received within the preset timeout period In the case of , record the data stored in the storage address into the exception database, and prompt the client that an exception has occurred.

Optionally, before sending the storage address to the client, the method further includes: receiving a secure socket websocket connection request sent by the client; and sending a message that the client and the server successfully establish a connection to the client.

Optionally, the websocket connection request carries the identification information of the client; the method further includes: storing the identification information of the client in the server after the connection between the client and the server is successfully established.

Optionally, the synchronization sequence identification includes: a character string obtained by encoding the identification information of the client and the time stamp.

Optionally, the response message is consistent with the synchronization sequence identifier, and the preset timeout period is determined according to the storage address corresponding to the client cache data, the round-trip time between the storage address and the synchronization sequence identifier between the client and the server, and the redundancy time.

Optionally, the method further includes: controlling the server to enter an idle state when receiving a response message sent by the client within a preset timeout period.

According to another aspect of the embodiment of the present application, there is also provided a communication method between a client and a server, including: determining the network status of the client; when the network status of the client is normal, sending a secure socket to the server websocket connection request; receive the message sent by the server that the client and the server have successfully established a connection, and receive the storage address corresponding to the data updated in the current update cycle sent by the server, where the storage address carries a synchronization sequence identifier, The synchronization sequence identifier is used to represent the request message sent by the server, and the updated data is stored in the database; the response message corresponding to the storage address and the synchronization sequence identifier is sent to the server.

Optionally, after receiving the storage address sent by the server and corresponding to the updated data in the current update cycle, the method further includes: caching the storage address locally.

Optionally, the method further includes: when receiving request messages of the same storage address sent by the server multiple times, caching the storage address in the last received request message locally, and storing the last received request message The response message sent to the server; when receiving the request message of different storage addresses sent by the server multiple times, the storage address in the last received request message is cached locally, and the last received request message The response message is sent to the server.

Optionally, after sending the response message corresponding to the storage address and the synchronization sequence identifier to the server, the method further includes: requesting data corresponding to the storage address in the database according to the storage address; receiving data corresponding to the storage address returned by the database.

According to still another aspect of the embodiment of the present application, there is also provided a communication device between the client and the server, including: an acquisition module, configured to acquire the data updated in the current update period in the database and the storage address corresponding to the data; The module is used to send the storage address to the client, wherein the storage address carries a synchronization sequence identifier, and the synchronization sequence identifier is used to represent the request message sent by the server; the processing module is used to receive the request message within the preset timeout period When the response message sent by the client is received, the operation of retransmitting the data overtime is performed, wherein the response message is a response to the data retransmission result corresponding to the storage address and the synchronization sequence identifier; the prompt module is used to check the data retransmission times When the preset threshold is reached and the response message sent by the client is not received within the preset timeout period, the data stored in the storage address is recorded in the exception database, and the client is notified of an exception.

According to yet another aspect of the embodiments of the present application, there is also provided an electronic device, including: a memory, used to store program instructions; a processor, connected to the memory, used to execute the program instructions to realize the following functions: obtain the current update in the database The data updated in the period and the storage address corresponding to the data; the storage address is sent to the client, where the storage address carries a synchronization sequence identifier, which is used to represent the request message sent by the server; within the preset timeout period When the response message sent by the client is not received within a period of time, the operation of retransmitting the data overtime is performed, wherein the response message is the response to the data retransmission result corresponding to the storage address and the synchronization sequence identifier; A threshold is set, and if no response message is received from the client within the preset timeout period, the data stored in the storage address is recorded in the exception database, and the client is prompted for an exception.

According to still another aspect of the embodiments of the present application, there is also provided a non-volatile storage medium, the non-volatile storage medium includes a stored program, wherein, when the program is running, the device where the non-volatile storage medium is located is controlled Execute the above communication method between the client and the server.

In this embodiment of the application, the storage address is sent to the client by obtaining the data updated in the current update cycle in the database and the storage address corresponding to the data, wherein the storage address carries a synchronization sequence identifier, and the storage address is stored within the preset timeout period. When the response message sent by the client is not received within a period of time, the operation of retransmitting the data overtime is performed. When the number of data retransmissions reaches the preset threshold and the response message sent by the client is not received within the preset timeout period , the data stored in the storage address is recorded in the exception database, and the client is prompted for an exception, which achieves the purpose of ensuring the reliability of data transmission based on data timeout retransmission, and realizes the timely notification of updated data to the client to ensure data The technical effect of consistency further solves the technical problem that the reliability and consistency of messages cannot be guaranteed when a long connection is established between the server and the client.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

FIG. 1 is a block diagram of a hardware structure of a computer terminal (or electronic device) for implementing a communication method between a client and a server according to an embodiment of the present application;

FIG. 2 is a flowchart of a communication method between a client and a server according to an embodiment of the present application;

Fig. 3 is a kind of flowchart of establishing websocket connection according to the embodiment of the present application;

FIG. 4a is a schematic diagram of message transmission between a client and a server according to an embodiment of the present application;

FIG. 4b is a schematic diagram of data timeout retransmission according to an embodiment of the present application;

FIG. 5 is a flow chart of a first type of client acquiring an updated data packet according to an embodiment of the present application;

FIG. 6 is a flow chart of obtaining an updated data packet by a second client according to an embodiment of the present application;

FIG. 7 is a flowchart of another communication method between a client and a server according to an embodiment of the present application;

Fig. 8 is a flow chart of requesting data according to an embodiment of the present application;

FIG. 9 is a flowchart of another communication method between a client and a server according to an embodiment of the present application;

Fig. 10 is a structural diagram of a communication device between a client and a server according to an embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

First of all, some nouns or terms that appear during the description of the embodiments of the present application are applicable to the following explanations:

Synchronization sequence identification: the syn number, the string obtained by base64 encoding of the identification information and timestamp of the client, the request sent by any server at any time is different, and the identification information of the client establishes a websocket connection between the client and the server stored in the server.

Response message: the ack number, which is consistent with the syn number, is used to notify the server that the client has received the request message sent by the server.

Timeout retransmission: The server does not receive the ack sent by the client, and will retransmit multiple times within the preset timeout period, which is the minimum timeout period. The minimum timeout time = the time of the client's cached data + the RTT time between the client and the server (the round-trip time of the data packet) + redundancy time, there is no standard for the number of retransmissions, and the timeout time needs to be recalculated after retransmission, among them, Redundant time refers to a fault-tolerant idea that uses the continuous characteristics of time to repeatedly execute the system process in which errors occur to eliminate errors when sporadic errors occur in the system.

Data cache: After the client receives the data sent by the server, it temporarily stores it locally.

According to an embodiment of the present application, an embodiment of a communication method between a client and a server is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

The embodiment of the communication method between the client and the server provided in the embodiment of the present application may be executed in a mobile terminal, a computer terminal or a similar computing device. FIG. 1 shows a block diagram of a hardware structure of a computer terminal (or electronic device) for implementing a communication method between a client and a server. As shown in Figure 1, the computer terminal 10 (or electronic device 10) may include one or more (shown by 102a, 102b, ..., 102n in the figure) processors (processors may include but not limited to microprocessors) MCU or a processing device such as a programmable logic device FPGA), a memory 104 for storing data, and a transmission module 106 for communication functions. In addition, it can also include: a display, an input/output interface (I/O interface), a universal serial bus (USB) port (which can be included as one of the ports of the I/O interface), a network interface, a power supply and/or camera. Those of ordinary skill in the art can understand that the structure shown in FIG. 1 is only a schematic diagram, and it does not limit the structure of the above-mentioned electronic device. For example, computer terminal 10 may also include more or fewer components than shown in FIG. 1 , or have a different configuration than that shown in FIG. 1 .

It should be noted that the one or more processors and/or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuit may be implemented in whole or in part as software, hardware, firmware or other arbitrary combinations. In addition, the data processing circuit can be a single independent processing module, or be fully or partially integrated into any of the other elements in the computer terminal 10 (or electronic equipment). As mentioned in the embodiment of the present application, the data processing circuit is used as a processor control (for example, the selection of the terminal path of the variable resistor connected to the interface).

The memory 104 can be used to store software programs and modules of application software, such as the program instruction/data storage device corresponding to the communication method between the client and the server in the embodiment of the present application, and the processor runs the software program stored in the memory 104 And modules, so as to execute various functional applications and data processing, that is, to realize the above-mentioned communication method between the client and the server. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include a memory that is remotely located relative to the processor, and these remote memories may be connected to the computer terminal 10 through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission module 106 is used to receive or send data via a network. The specific example of the above-mentioned network may include a wireless network provided by the communication provider of the computer terminal 10 . In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (Radio Frequency, RF) module, which is used to communicate with the Internet in a wireless manner.

The display may be, for example, a touchscreen liquid crystal display (LCD), which may enable a user to interact with the user interface of the computer terminal 10 (or electronic device).

It should be noted here that, in some optional embodiments, the computer equipment (or electronic equipment) shown in FIG. 1 may include hardware components (including circuits), software components (including computer code), or a combination of both hardware and software elements. It should be noted that FIG. 1 is only one example of a particular embodiment, and is intended to illustrate the types of components that may be present in the computer device (or electronic device) described above.

In the above operating environment, the embodiment of the present application provides a communication method between the client and the server as shown in FIG. 2 . Fig. 2 is a flowchart of a communication method between a client and a server according to an embodiment of the present application. As shown in Fig. 2, the method includes the following steps:

Step S202, acquiring the data updated in the current update period in the database and the storage address corresponding to the data;

Step S204, sending the storage address to the client, wherein the storage address carries a synchronization sequence identifier, and the synchronization sequence identifier is used to represent the request message sent by the server;

Step S206, when the response message sent by the client is not received within the preset timeout period, the operation of retransmitting the data overtime is performed, wherein the response message is the result of retransmission of the data corresponding to the storage address and the synchronization sequence identifier response;

Step S208, when the number of data retransmissions reaches the preset threshold and the response message sent by the client is not received within the preset timeout period, record the data stored in the storage address into the exception database, and prompt the client An exception occurred on the terminal.

In the embodiment of the present application, a maximum number of retransmissions is set, and the maximum number of retransmissions corresponds to a preset threshold of the number of data retransmissions. In the maximum number of retransmissions, if the response message sent by the client is not received after the preset timeout period, the client will be prompted that an exception has occurred.

In step S204 in the communication method between the client and the server, before the storage address is sent to the client, the flow chart shown in Figure 3 specifically includes the following steps:

Step S302, receiving the secure socket websocket connection request sent by the client;

Step S304, sending a message that the connection between the client and the server is successfully established to the client.

In step S302 to step S304, the prerequisite for successful data transmission between the server and the client is that the client and the server have established a websocket communication connection. Initiate a websocket connection request. After receiving the connection request sent by the client, the server establishes a websocket connection channel with the client and informs the client of the successful establishment of the websocket connection.

In the above step S302, the websocket connection request carries the identification information of the client. After the client and the server successfully establish a connection, the method stores the identification information of the client in the server. The identification information of the client is unique, that is, Different clients correspond to different identification information.

In the step S204 of the communication method between the client and the server, the synchronization sequence identification includes: a character string obtained by base64 encoding the identification information of the client and the time stamp, that is, the syn number.

In step S206 in the communication method between the client and the server, the response message is consistent with the synchronization sequence identifier, and the preset timeout period is based on the time of the storage address corresponding to the client cache data, the storage address and the synchronization sequence identifier in the client. The round-trip time and redundancy time between the client and the server are determined.

It should be noted that after the server sends the storage address corresponding to the updated data to the client, assuming that there is a network problem, the server cannot directly report an error, that is, the server cannot directly prompt the client after catching the exception. The reasons are as follows : Assume that after the data packet corresponding to the storage address sent by the server reaches the client, the client may not be able to process it due to various unknown reasons, that is, it cannot send a response message to the server in time. In this case, if the server only guarantees the arrival of data packets, the client needs to rely on a more complex mechanism to pull and update data when the client restores the network and the mechanism is normal. And if the client can cache the data packets sent by the server, the client only needs to continuously poll the local data and do further processing. The fact that the client cannot process the request temporarily does not belong to the exception of ws (websocket). If the server does not receive the response message (ie ack) sent by the client, the server cannot perceive this abnormal situation, and it will The server cannot handle it. Therefore, when the data packet arrives at the client, the client needs to return a response message as a guarantee. At the same time, the response message must be sent back after the client performs persistent processing on the data packet sent by the server. Cache the data packet, and then return the response message.

In the communication method between the client and the server, when a response message sent by the client is received within a preset timeout period, the server is controlled to enter an idle state. In step S206, if the response message sent by the client is not received within the preset timeout period, data retransmission is required, and an error cannot be reported if no response message is received within a preset timeout period. The reason is that the response message is sent back after the client performs persistence processing, and the processing speed of the client and the network speed may be unstable. Therefore, the time for the response message from the client to reach the server fluctuates to a certain extent. If there is no response message, it is determined that the data packet has failed to be sent, and a large number of abnormal results may appear on the server.

Under normal circumstances, in the schematic diagram of message transmission between the client and the server as shown in Figure 4a, after the server sends the data and the syn number of the synchronization sequence identifier to the client, the client first caches the data locally, and then stores the data with The response message ack corresponding to syn is returned to the server. When the server receives the response message sent by the client within the preset timeout period, it enters the idle state; if it does not receive the response sent by the client within the preset timeout period When the message is sent, the data timeout retransmission operation is performed. After the timeout retransmission ends and there is no updated data to be sent to the client, the server enters the idle state.

In another optional embodiment, in the schematic diagram of data timeout retransmission shown in Figure 4b, the response message returned by the client is lost in the network, and the server does not receive the If the response message is transmitted, the operation of retransmitting the data overtime will be performed. After the client returns the response message for the first time, it still receives the data packet with the maximum number of retransmissions sent by the server. When the data packet is received, the response message of the data packet is sent back again to notify the server. After the server sends the data packet with the maximum number of retransmissions, it still has to wait for the preset timeout period before recording the exception in the exception database. The reason for waiting for the preset timeout period is to wait for the last response message returned by the client. . If the server has not received the response message sent by the client within the preset timeout period, the exception will be recorded in the exception database; if the server receives the response message sent by the client within the preset timeout period , there is no need to log the exception.

In the above process, there is a small probability but possible situation, that is, in the process of overtime retransmission, the server updates new data. At this time, the server has two sending situations: when it is a low-frequency operation , the latest updated data and timeout retransmitted data are all sent to the client. The impact of repeated transmission on network congestion is not obvious, but it can ensure that all the pushed data reaches the client. The client can rely on idempotence Realize conditional update; when it is a high-frequency operation, only the latest updated data is transmitted to the client.

Through the above description, the reliability of data transmission can be guaranteed, but it is necessary to design a data consistency scheme for the unstable state of the client. There are two design ideas, one is to ensure that the client does not experience abnormalities, and the other is to maintain data consistency after the client returns to normal even if the client is abnormal.

There are many reasons that may cause the client to be abnormal, such as power failure or artificial forced shutdown. In this case, it cannot be avoided by any technical means. Therefore, it is necessary to consider how to maintain data consistency after the client returns to normal.

Data consistency can be guaranteed through the following two schemes. In the flow chart of the first type of client obtaining updated data packets shown in Figure 5, when the client restarts and the network returns to normal, the client queries all previous data packets through the server. The polling interface, such as the interface corresponding to the data packet or the interface activated by scanning the code, etc., checks whether the server has updated data. If the server has updated data, the server will send the first message of the updated data to the client. message, the client sends a websocket connection request to the server after receiving the first message sent by the server, and establishes a websocket channel between the client and the server, and the server sends a message that the websocket channel is successfully established to the client, and The updated data corresponds to the storage address in the database, that is, the second message is sent to the client, wherein the storage address carries a synchronization sequence identifier (syn number), and the client receives the data corresponding to the updated data sent by the server. After the second message of the storage address of the second message, the storage address in the second message is cached locally, and the response message (ack) of the second message is sent back to the server, and the server receives the client within the preset timeout period When the response message sent by the terminal enters the idle state, the client requests the data corresponding to the second message in the database according to the storage address corresponding to the updated data in the local cache. After receiving the request message from the client, the database sends the corresponding data to returned to the client. If the client fails to connect to the server after sending a websocket connection request to the server, an alarm will be displayed on the client to prompt the user that the server cannot be connected.

Fig. 6 is a flow chart of the second type of client obtaining updated data packets according to the embodiment of the present application, which can also ensure data consistency. In Fig. 6, when the client reconnects and the network returns to normal, the client Send a websocket connection request to the server, and establish a websocket channel between the client and the server. The server sends the message that the websocket channel is successfully established to the client, and checks whether there is any data that has not been successfully sent in the exception database. There is updated data, and when there is updated data, the server sends the storage address corresponding to the updated data in the database and the storage address corresponding to the previously unsuccessfully sent data to the client as a third message, wherein the storage The address carries a synchronization sequence identifier (syn number). After receiving the third message sent by the server that contains the storage address corresponding to the updated data and the storage address corresponding to the data that was not successfully sent before, the client sends the third The storage address in the message is cached locally, and the response message (ack) of the third message is sent back to the server. When the server receives the response message sent by the client within the preset timeout period, it enters the idle state, and the client The terminal requests the corresponding data in the database according to the storage address in the locally cached third message, and the database returns the corresponding data to the client after receiving the request message from the client. If the client fails to connect to the server after sending a websocket connection request to the server, an alarm will be displayed on the client to prompt the user that the server cannot be connected.

Comparing the process of obtaining updated data packets by the above two clients, we can know that the second solution is better than the first one, because the process of pushing data is all concentrated on the server side, and no more interfaces need to be opened. Calling the client makes the code more cohesive; secondly, in the second solution, it is consistent with the above-mentioned data retransmission due to network jitter. Therefore, in the second solution, no matter what the client causes the ws channel to be disconnected, once the client’s network returns to normal, the server will retransmit all unsuccessful data packets, which reduces the understanding of other developers difficulty.

Through the above steps, the data updated in the current update cycle in the database and the storage address corresponding to the data are obtained, and the storage address is sent to the client, wherein the storage address carries a synchronization sequence identifier, which is not received within the preset timeout period When the response message sent by the client, the operation of retransmitting the data overtime is performed. When the number of data retransmissions reaches the preset threshold and the response message sent by the client is not received within the preset timeout period, the address will be stored. The stored data is recorded in the exception database, and the client is notified of an exception, which achieves the purpose of ensuring the reliability of data transmission based on data overtime retransmission, and realizes the technology of notifying the client of updated data in time to ensure data consistency. Effect, and then solve the technical problem that the reliability and consistency of messages cannot be guaranteed when a long connection is established between the server and the client.

Fig. 7 is a flowchart of another communication method between the client and the server according to an embodiment of the present application, that is, the communication method between the client and the server is described from the perspective of the client, as shown in Fig. 7 , the The method includes the following steps:

Step S702, determining the network status of the client;

Step S704, when the network status of the client is normal, send a websocket connection request to the server;

Step S706, receiving the message of successfully establishing the connection sent by the server, and receiving the storage address corresponding to the updated data in the current update cycle sent by the server, wherein the storage address carries a synchronization sequence identifier, which is used to indicate The request message sent by the server, the updated data is stored in the database;

Step S708, sending a response message corresponding to the storage address and the synchronization sequence identifier to the server.

In step S706 of the communication method between the client and the server, after receiving the storage address sent by the server and corresponding to the data updated in the current update cycle, the method further includes the following steps: caching the storage address locally.

In step S702 to step S708 in the communication method between the client and the server, according to whether the storage address sent by the server received by the client is the same, the method also includes the following two aspects: When sending a request message with the same storage address, the storage address in the last received request message is cached locally, and the response message of the last received request message is sent to the server; after receiving the server multiple times When sending request messages with different storage addresses, the storage address in the last received request message is cached locally, and the response message of the last received request message is sent to the server. It should be noted that in the last received request message, it may contain the storage address corresponding to the data that was not sent successfully and the updated data, or it may only contain the storage address of the data that was not sent successfully, or it may only contain the updated data The corresponding address and the specific content contained in the request message need to be determined according to the actual situation.

In step S708 in the communication method between the client and the server, after sending the response message corresponding to the storage address and the synchronization sequence identifier to the server, as shown in the flow chart in Figure 8, the method specifically includes the following steps:

Step S802, requesting data corresponding to the storage address in the database according to the storage address;

Step S804, receiving the data corresponding to the storage address returned by the database.

Fig. 9 is a flowchart of another communication method between the client and the server according to the embodiment of the present application, that is, the communication method between the client and the server is described from the perspective of the database, as shown in Fig. 9, the method Including the following steps:

Step S902, acquiring data updated by the server;

Step S904, storing the updated data, and returning the storage address corresponding to the updated data to the server;

Step S906, receiving a data request from the client, wherein the data request includes a storage address corresponding to the updated data;

Step S908, returning the data corresponding to the storage address to the client.

FIG. 10 is a structural diagram of a communication device between a client and a server according to an embodiment of the present application. As shown in FIG. 10 , the device includes:

An acquisition module 1002, configured to acquire data updated in the current update period in the database and a storage address corresponding to the data;

The sending module 1004 is configured to send the storage address to the client, wherein the storage address carries a synchronization sequence identifier, and the synchronization sequence identifier is used to represent a request message sent by the server;

The processing module 1006 is configured to perform data overtime retransmission when the response message sent by the client is not received within the preset timeout period, wherein the response message is to retransmit the data corresponding to the storage address and the synchronization sequence identifier Response to the result;

Prompt module 1008, configured to record the data stored in the storage address into the exception database when the number of times of data retransmission reaches a preset threshold and no response message sent by the client is received within the preset timeout period, And prompt the client to have an exception.

It should be noted that the communication device between the client and the server shown in FIG. 10 is used to execute the communication methods between the client and the server shown in FIGS. 2 to 9 , so the above-mentioned communication between the client and the server Relevant explanations in the method are also applicable to the communication device between the client and the server, and will not be repeated here.

The embodiment of the present application also provides a non-volatile storage medium, the non-volatile storage medium includes a stored program, wherein, when the program is running, the device where the non-volatile storage medium is located is controlled to execute the following client and Communication method between servers: Obtain the data updated in the current update cycle in the database and the storage address corresponding to the data; send the storage address to the client, where the storage address carries a synchronization sequence identifier, which is used to indicate the service The request message sent by the terminal; when the response message sent by the client is not received within the preset timeout period, the operation of data overtime retransmission is performed, wherein the response message is the retransmission of the data corresponding to the storage address and the synchronization sequence identifier Response to the transmission result; when the number of data retransmissions reaches the preset threshold and the response message sent by the client is not received within the preset timeout period, the data stored in the storage address is recorded in the exception database, and Prompt the client that an exception has occurred.

The serial numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments.

In the above-mentioned embodiments of the present application, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be realized in other ways. Wherein, the device embodiments described above are only illustrative. For example, the division of the units may be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrate into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions for enabling a computer device (which may be a personal computer, server or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes. .

The above description is only the preferred embodiment of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, some improvements and modifications can also be made. These improvements and modifications are also It should be regarded as the protection scope of this application.

Claims (13)

1. A method of communication between a client and a server, comprising:

acquiring updated data in a current updating period in a database and a storage address corresponding to the data;

the storage address is sent to a client, wherein the storage address carries a synchronization sequence identifier, and the synchronization sequence identifier is used for representing a request message sent by a server;

when a response message sent by the client is not received within a preset timeout period, performing data timeout retransmission, wherein the response message is a response to a data retransmission result corresponding to the storage address and the synchronous sequence identifier;

and under the condition that the data retransmission times reach a preset threshold value and the response message sent by the client is not received within the preset timeout period, recording the data stored by the storage address into an abnormal database, and prompting the client to be abnormal.

2. The method of communication between a client and a server of claim 1, wherein prior to sending the storage address to the client, the method further comprises:

receiving a secure socket connection request sent by the client;

And sending the message of successfully establishing the connection between the client and the server to the client.

3. The communication method between the client and the server according to claim 2, wherein the websocket connection request carries identification information of the client; the method further comprises the steps of: and after the client and the server are successfully connected, the identification information of the client is stored in the server.

4. The method of communication between a client and a server according to claim 1, wherein the synchronization sequence identification includes: and the character string is obtained after the identification information of the client and the time stamp are encoded.

5. The method according to claim 1, wherein the response message is consistent with the synchronization sequence identifier, and the preset timeout period is determined according to a time of the client buffering the storage address corresponding to the data, a round trip time of the storage address and the synchronization sequence identifier between the client and the server, and a redundancy time.

6. The communication method between a client and a server according to any one of claims 1 to 5, characterized in that the method further comprises: and when receiving the response message sent by the client in the preset timeout period, controlling the server to enter an idle state.

7. A method of communication between a client and a server, comprising:

determining the network state of the client;

when the network state of the client is normal, sending a secure socket connection request to a server;

receiving a message that the client and the server successfully establish connection and a storage address corresponding to data updated in a current update period, wherein the storage address carries a synchronization sequence identifier, the synchronization sequence identifier is used for indicating a request message sent by the server, and the updated data is stored in a database;

and sending a response message corresponding to the storage address and the synchronous sequence identifier to the server.

8. The method according to claim 7, wherein after receiving a storage address corresponding to data updated in a current update period sent by the server, the method further comprises: and caching the storage address to the local.

9. The method of communication between a client and a server of claim 7, further comprising:

When receiving the request messages with the same storage address sent by the server for many times, caching the storage address in the request message received last time to the local and sending the response message of the request message received last time to the server;

when receiving the request messages of different storage addresses sent by the server for many times, caching the storage address in the request message received last time to the local and sending the response message of the request message received last time to the server.

10. The method according to claim 7, wherein after transmitting a response message corresponding to the storage address and the synchronization sequence identification to the server, the method further comprises:

requesting data corresponding to the storage address in the database according to the storage address;

and receiving data corresponding to the storage address returned by the database.

11. A communication device between a client and a server, comprising:

the acquisition module is used for acquiring the data updated in the current update period in the database and the storage address corresponding to the data;

The sending module is used for sending the storage address to the client, wherein the storage address carries a synchronous sequence identifier, and the synchronous sequence identifier is used for representing a request message sent by the server;

a processing module, configured to perform an operation of data timeout retransmission when a response message sent by the client is not received within a preset timeout period, where the response message is a response to a data retransmission result corresponding to the storage address and the synchronization sequence identifier

The prompting module is used for recording the data stored by the storage address into an abnormal database and prompting the client to be abnormal when the data retransmission times reach a preset threshold value and the response message sent by the client is not received within the preset timeout period.

12. An electronic device, comprising:

a memory for storing program instructions;

a processor, coupled to the memory, for executing program instructions that perform the following functions: acquiring updated data in a current updating period in a database and a storage address corresponding to the data; the storage address is sent to a client, wherein the storage address carries a synchronization sequence identifier, and the synchronization sequence identifier is used for representing a request message sent by a server; when a response message sent by the client is not received within a preset timeout period, performing data timeout retransmission, wherein the response message is a response to a data retransmission result corresponding to the storage address and the synchronous sequence identifier; and under the condition that the data retransmission times reach a preset threshold value and the response message sent by the client is not received within the preset timeout period, recording the data stored by the storage address into an abnormal database, and prompting the client to be abnormal.

13. A non-volatile storage medium, characterized in that the non-volatile storage medium comprises a stored program, wherein the program, when run, controls a device in which the non-volatile storage medium is located to perform the communication method between the client and the service according to any one of claims 1 to 6.